This textbook presents elementary principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, pyronomics [sic], optics, electricity, galvanism, magnetism, electromagnetism, magneto-electricity, and astronomy. Among topics covered are descriptions and illustrations of McCormick's reaper, Sharps' Rifle, printing presses, House's printing telegraph, manufacture of percussion caps, the organ, monochord, hygrometer, harmonicon, air-gun, dipping needle, and much new matter on electromagnetism.